Lakes / Oregon / Douglas County / Diamond Lake
Diamond Lake, Oregon
3,040 acres
Surface Area
Where It Sits, and How Deep It Goes
Locator - Oregon
43.16 degrees N, 122.15 degrees W - Douglas County. State and county outlines drawn from Census boundary data; the lake marker is placed by its USGS National Hydrography Dataset coordinates, not by eye. Schematic - not a survey map.
How Diamond Lake Stacks Up
- Larger than 94% of the 642 lakes counted in Oregon.
- The largest lake in Douglas County among those counted.
- About 68 miles from Medford, as the crow flies.
Lakes Nearby
| Lake | County | Distance | Surface Area |
|---|---|---|---|
| Lemolo Lake | Douglas | 11 mi | 432 acres |
| Miller Lake | Klamath | 11 mi | 519 acres |
| Toketee Lake | Douglas | 15 mi | 79 acres |
| Crater Lake | Klamath | 15 mi | 13,211 acres |
| Timpanogas Lake | Douglas | 18 mi | 38 acres |
| Fish Lake | Douglas | 19 mi | 95 acres |
Straight-line distance between lake centers.
Facts and Figures
Questions About Diamond Lake
How Big Is Diamond Lake?
Diamond Lake covers 3,040 acres in Douglas County, Oregon.
What Is the Largest Lake in Douglas County?
Diamond Lake is the largest lake in Douglas County, at 3,040 acres.
Largest Lakes in Oregon
| # | Lake | County | Surface Area | Max Depth |
|---|---|---|---|---|
| 1 | Upper Klamath Lake | Klamath | 62,095 acres | - |
| 2 | Lake Umatilla | Morrow | 50,042 acres | - |
| 3 | Lake Abert | Lake | 37,137 acres | - |
| 4 | Summer Lake | Lake | 31,602 acres | - |
| 5 | Harney Lake | Harney | 31,290 acres | - |
All 642 Oregon lakes ranked by surface area
Sources: USGS NHD (The National Map NHD MapServer layer 12) named waterbodies FTYPE 390/436; counties via Census point-in-polygon lake data (ID 121517312). Verified October 30, 2026.